2009/12/16 Goran Meki� <[1]m...@ns-linux.org> � � Is there a way to recognize what footprint I need for an element other then printing them all and comparing it to real element? Let's say it's 2200uF polar cap. I know it's RCY*, but how to figure out what's *? Thanx!
I have been using the footprint naming convention that is documented in the "Naming Specification" link at [2]http://tinyurl.com/67k3hn The spec is based on IPC-7351. After using this for a while I have found it very easy map footprints to names. The component type prefixes like CAPR, QFN, etc make it easy to find families of parts. The suffix tags for the various attributes -- D for diameter, P for pin spacing, N for number of pins, etc. Since I keep each footprint in a separate file in a single directory I just use dired mode in EMACS to search. It is very quick. You won't be able to find a footprint based solely on the electrical specification since the electrical specification doesn't map to a single physical specification. A polarized cap with radial leads would be CAPPR in my footprints. You would need to know body diameter and pin spacing to determine the footprint. (* jcl *) -- You can't create open hardware with closed EDA tools. twitter: [3]http://twitter.com/jluciani blog: � � [4]http://www.luciani.org References 1. mailto:m...@ns-linux.org 2. http://tinyurl.com/67k3hn 3. http://twitter.com/jluciani 4. http://www.luciani.org/
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